What happens when my hair goes gray after hair transplantation?

This 77 year old male patient let his hair go gray a few years after having hair restoration surgery with Dr. Wasserbauer. He had hair loss in the front crown, Norwood hair loss classification 4, and Dr. Wasserbauer performed 2 FUT procedures 1 year apart, transplanting 2,849 grafts, a total of 5,616 hairs. As you can see from his photos his hair density is excellent and the gray hair looks completely natural.